Pump



H. R. ELLlNwooD March 2, 1943.

PUMP

Fild May 25, 1940 single drive means my invention;

vPatented Mar. 2, 19143 UNITED STATES PATENT OFFICE- PUMP Herman Ray Eilinwood, North Hollywood, Calif., assignor to Adel Precision Products Corpora tion, Burbank, Calif., a corporation of Cali- 'ornia application May 25, 1940, senar'No. 337,215

(ci. rc3-13o) 3 Claims.

. tions and at all times is desired.

Another purpose of my invention is lto .provide a pump having the above noted feature and qualities, wherein the parts and elements are of simple form and subject to being easily and inexpensively produced as well as quickly and easily assembled and disassembled.

A further purpose of my invention is to provide a pump such as described wherein a novel construction and arrangement of the parts thereof make possible a multiple unit pump structure without appreciably increasing the size, bulk or operating cost of the pump; it only being necessary to add an outlet for each added pump unit inasmuch as a single inlet, a single shaft and a will serve a plurality of pump units.

My invention also comprehends the provision of a novel and simplified pump unit which comprises a simple disk-like cylindrical rotor, concentric with its driving shaft and disposed to rotate in an eccentric bore of a radially ported stator ring or cylinder the outer periphery of which is concentric with the axis oi the rotor. The rotor is provided with radial pumping vanes which contact the wall of eccentric bore. Hence it is seen that one or more of such units may be axially moved into and out of operative position with respect to a cylindrical bore of a housing in which latter a single inlet and an outlet per pump unit will provide for the correct operation of the pump in a highly efcacious manner. This construction and arrangement reduces the cost of production and simplifies the construction of the parts as Well as the assembly and disassembly operations.

- With the foregoing objects in view, together with such other objects and advantages as may subsequently appear, the invention is carried into effect as illustrated by way of example in'the accompanying drawing, in which:

Fig. 1 is a side elevation of a pump embodying Fig. 2 is an enlarged vertical section taken on the line 2-2 of Fig. 1;

' plane.

it is the present day practice to provide passages removal of these plugs the parts in the main bore Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is a perspective view of one of the eccentrically bored stator-rings.

In the embodiment .of my invention shown in the accompanying drawing a single housing E is made up of a rotor enclosing portion 5a for a rotor 6, and a pump enclosing portion 5b in which latter a reduction worm drive 1 connects the rotor shaft 8 with a pump shaft 9. In the present instance two pump units l0 and Ii yare 'mounted on the shaft 9 and operate inthe housing portion 5b although it is obvious that any. number of such units may be used since theyv are arranged in axial alignment and are served .by a common housing inlet opening l2 to which a liquid supply line i3 is connected. Outlet openings I4 and I5 are provided in the housing for the respective pump units l0 and I i, and pipe lines 'I6 and I 'l are connected with said outlets for supplying liquid to designated places, as for example, the propellers of a twin motored air- In this connection it should be noted that or bores in the hub and blades of a propeller for applying to the exterior surfaces of the propeller an anti-freezing or de-iclng liquid. Hence the two unit pump of the present invention provides for applying such a liquid to an airplane having two'propellers or to two different parts of the airplane. v

In accordance with my invention the pump housing 5b isof substantially cylindrical form and mounted in the present instance in upright position but, as will be apparent with reference to the drawing and the complete description thereof, could be disposed in any position. As here shown the housing is cylindrically bored from each end to a center partition I8 having an opening I8. 'I'his partition defines a cylindrical pump chamber 5c and a similar worm drive enclosing chamber 5d. These chambers areclosed by screw threadedplugs I9 and 20.

The pump shaft 9 extends through the lpartition opening I8 and on one side of said partition`is a ball bearing 2| for the shaft. The plugs I 9 and 20 act as thrust bearings forand engage terminal portions of the shaft 9. Upon are withdrawable through the ends of said boire. At its lower end the shaft 9 is journalled in the plug 20 and has a bearing or stop ange 22 resting on the inner face of said plug, whereas the upper end of the shaft is engaged with a single anti-friction ball 23 seated in the plug I9.

To prevent leakage from the pump chamber into the drive chamber the housing portion 5b is slotted as at 24 so that any leakage around the pump shaft will run outwardly through the slot rather than around the shaft and through the partition into the lower chamber. An annular packing member 25 surrounds the shaft in a counterbore 26 above the partition to check leakage, but should leakage take place the liquid will run out through the slot 24 as aforesaid.

Each of the pump units here shown comprises acylindrical ring like stator 21 having 'a bore 23 disposed eccentrically thereof. The stator is adapted to be fitted into the cylindrical pump chamber as shown in Figs. 1 and 2 andis held in place by a simple straight key 29 as shown in Figs. 1 and 3, said key being lheld in`place by the plug I9, yet being readily removable axially of the pump chamber as are also the parts of the pump units when the plug I9 is removed.

Each ring is provided with an arcuate intake part 30 in registration with the inlet opening of the housing, anda discharge port 3I in registration with its'associated outlet `opening of the housing. A cylindrical rotor 32 is mounted within the eccentric bore of each stator ring but is concentric with the pump shaft to which it is keyed. On each rotor are radially movable spring loaded vanes 33 having beveled outer ends '36 which contact the wall of the eccentric bore.

'I'hese vanes producea pumping action upon rotation of the rotors and the fluid is drawnv into and then pumped to the designated places through the pipe lines I 6 and I'I. A partition plate 36 is placed between the pump units and similar plates 3T and 38 cover the outer side. of the outer unit and the inner side of the inner unit. These partition plates are held against turning by the key 29, it being noted that said plates and the stators are notched to receive the key. The partition plates are readily removable as are the stators and rotors. As shown in Figs. 2 and 3 the wall of the main bore of the housing is formed with an axially extending recess I2 which axially and transversely intersects the in.et opening I2 as well as the plane of the partition 36, which plane passes through said inlet opening. 'Ihe intake ports 30 in the two stators register with inner and outer extremities of the recess I 2' which therefore passes uid from the opening I2 axially past the adjacent edge of the opening I2 axially past the adjacent dge of the partition 36 into the ports 30. This partition separates the outlet ports 3I which are axially spaced from the partition and liein the planes of and are opposed to the intake ports 30,

It is important to note that the pump hereof 'is especially constructed and arranged to perform faithfully with an extremely low pumping capacity, for example two quarts of liquid per hour. Hence it is seen that the pump may be made extremely small and therefore conveniently placed on an airplane and operated with a small expenditure of power'to supply an anti-freezing or a de-icing fluid to the desired surfaces in the best possible manner to prevent ice formations on such surfaces. The pump may be efllcaciously employed however for any purpose where'it is ldesired to continuously supply at a low rate to designatedpoints a small quantity of liquid.

The particular construction and arrangement of the pump assures long liie ofthe parts and reliable performance over long periods of time without servicing. However replacement of parts may be readily accomplished when necessary due to the particular construction and arrangement of the pump units.

I claim:

l. A pump comprising a housing having a cylindrical bore and provided with a single intake opening and a plurality of outlet openings, a plurality of pump units mounted in axial alignment in said bore, each of said units including an annular stator fitted in said bore and having an intake port, said housing having a recess extending axially of and in the wall of said bore and intersecting, both axially and transversely, said intake opening and communicating with the intake ports in the stators of said units; each stator also having an outlet port registering with one of the outlet openings, each stator having an eccentric bore, a drive shaft extending axially through the stators ofthe pump units, a cylindrical rotor for each pump unit mounted on said shaft and disposed in the eccentric bore of each stator, and a plurality of radially disposed spring loaded vanes on each rotor for contact with the wall of its associated eccentric bore.

2. A pump comprising a housing having a cylindrical bore and provided with a single intake opening and a plurality of outlet openings, a plurality of pump units mounted in axial alignment in said bore, each of said units including an annular stator fitted in said bore and having an intake port, said housing having a recess extending axially of and in the wall of said bore and intersecting said intake opening and communicating with the intake ports in the stator of said units, each stator also having an outlet port registering with one of the outlet openings, each 'stator having an eccentric bore, adrive shaft extending axially through the stators of the pump units, a cylindrical rotor for each pump unit mounted on said shaft and disposed in the eccenbore, and a partition plate disposed between said pump units in a plane which intersects theintake opening and said recess.

3. In a pump, a housing having bores extending axially from and through opposite ends, a partition between said bores having an opening therein, said housing having an intake opening and an outlet opening extending into one of the bores, an annular stator in said one bore having arcuate ports registering with said intake and outlet openings, said stator having an eccentric bore, a drive shaft extending from the other bore through the opening in said partition and through the stator, a cylindrical rotor mounted on said shaft and disposed in said eccentric bore, spring loaded radial vanes carried by said rotor and contacting the wall of said eccentric bore, drive means associated with said shaft, removable plugs screwed into and closing the outer ends of said bores, a thrust member on the shaft engaging one of the plugs, and a bearing member interposed between one end of the shaft and the other plug,

HERMAN RAY ELLINWOOD. 

